| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1f5fe6c23d5b432a23267102f2d72b787d80fdd8.1435602481.git.luto@kernel.org> Date: Mon, 29 Jun 2015 12:33:37 -0700 From: Andy Lutomirski <luto@...nel.org> To: x86@...nel.org, linux-kernel@...r.kernel.org Cc: Frédéric Weisbecker <fweisbec@...il.com>, Rik van Riel <riel@...hat.com>, Oleg Nesterov <oleg@...hat.com>, Denys Vlasenko <vda.linux@...glemail.com>, Borislav Petkov <bp@...en8.de>, Kees Cook <keescook@...omium.org>, Brian Gerst <brgerst@...il.com>, paulmck@...ux.vnet.ibm.com, Andy Lutomirski <luto@...nel.org> Subject: [PATCH v4 05/17] notifiers: Assert that RCU is watching in notify_die Low-level arch entries often call notify_die, and it's easy for arch code to fail to exit an RCU quiescent state first. Assert that we're not quiescent in notify_die. Signed-off-by: Andy Lutomirski <luto@...nel.org> --- kernel/notifier.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/notifier.c b/kernel/notifier.c index ae9fc7cc360e..980e4330fb59 100644 --- a/kernel/notifier.c +++ b/kernel/notifier.c @@ -544,6 +544,8 @@ int notrace notify_die(enum die_val val, const char *str, .signr = sig, }; + rcu_lockdep_assert(rcu_is_watching(), + "notify_die called but RCU thinks we're quiescent"); return atomic_notifier_call_chain(&die_chain, val, &args); } NOKPROBE_SYMBOL(notify_die); -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists